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Optical pick-up actuator

a technology of optical pick-up actuator and actuator, which is applied in the direction of data recording, instruments, disposition/mounting of heads, etc., can solve the problems of increasing the difficulty of performing focus and tilt servo operations, and the difficulty of applying this method in servo operations

Inactive Publication Date: 2008-05-22
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]Aspects of the present invention provide an optical pick-up actuator that is structurally simple and capable of an independent tilt servo operation.

Problems solved by technology

However, it is difficult to apply this method in servo operations because focusing and tilting operations are performed with one pair of focusing coils.
When mutual coupling exists between focusing and tilting operations due to the structure of an optical pick-up actuator or due to limitations imposed by the assembly of the optical pick-up actuator the effects of this coupling when used in servo control, increases the difficulty in performing the focus and tilt servo operations.

Method used

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Examples

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Embodiment Construction

[0025]Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0026]FIG. 1 is a schematic perspective view illustrating an optical pick-up actuator according to an example embodiment of the present invention. FIG. 2 illustrates a disassembled perspective view of the optical pick-up actuator of FIG. 1. FIG. 3 is a perspective view of a separately illustrated triaxial magnetic driving portion of the optical pick-up actuator of FIG. 1.

[0027]Referring to FIGS. 1 through 3, the optical pick-up actuator according to an example embodiment of the present invention includes a movable portion 20 on which an object lens 10 is mounted, a supporting portion movably supporting the movable portion 20, and a triaxial magnetic dr...

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Abstract

An optical pick-up actuator capable of a tilt operation. The optical pick-up actuator has a triaxial magnetic driving portion installed on a movable portion and a supporting portion to move the movable portion in a focusing direction and a tracking direction and tilt the movable portion. The triaxial magnetic driving portion includes a pair of focusing / tilting driving magnets, a pair of tracking driving magnets, focusing coils, a pair of tilt coils, and a pair of tracking coils. The pair of tilt coils installed on the movable portion each face one of the pair of focusing / tilting driving magnets and are wired independently from the pair of focusing coils.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims all benefits accruing under 35 U.S.C. §119 from Korean Patent Application No. 2006-113900, filed on Nov. 17, 2006 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]Aspects of the present invention relate to an optical pick-up actuator, and more particularly, to an optical pick-up actuator with a slim structure, capable of an independent tilt servo operation.[0004]2. Related Art[0005]Conventional optical pick-up actuators that are tilted can be categorized into independently driven and differentially driven actuators. In the case of independently driven actuators, in order to form a tilt driving mechanism separately from focusing coils, a magnetic circuit with separate magnets, a tilt coil, and other components is provided to independently drive tilting of the actuator.[0006]In the case of differenti...

Claims

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Application Information

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IPC IPC(8): G11B7/00
CPCG11B7/0933G11B7/0956G11B7/0935G11B7/085G11B7/09G11B7/095G11B7/08
Inventor KIM, SEOK-JUNGPARK, SE-JUNEPARK, SON-HANAHN, YOUNG-MAN
Owner SAMSUNG ELECTRONICS CO LTD